Malicious PDF — malware analysis report

Static analysis result for SHA-256 768277a5486b2c34…

MALICIOUS

PDF

77.4 KB Created: 2020-12-19 20:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 488150c353ed400e511a846e388127a1 SHA-1: 90e997dc814542f8cde259efc7afcf42cf1f354a SHA-256: 768277a5486b2c34faa9dd04c0fba78aa37dccb0b9133a9dd13e9a5a81cf3716
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document attempts to trick the user into executing commands. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/aws?utm_term=araxis+merge++trial In PDF document text
    • https://dijozigi.weebly.com/uploads/1/3/4/7/134748041/7599674c16f55ec.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/zivimejilivodixusu.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/3836453.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5a999c14dfd36fe120027/t/5fc7ac49a907d7439ce2c748/1606921292232/jemaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bc5829-05bd-49a1-bb0f-26225040d72d/tidamaluwavazurowuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a7b7e1-6d12-4c44-beb3-20374e28340d/template_kalender_2020_lengkap_cdr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f773a47c-feaa-46e3-83ba-03aee52c85d0/change_dhgate_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951b6d8b-85d1-4a37-a43d-588ec2ed3860/62455554237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97e1160-0bbf-44c4-8bef-5c908ffe8d98/veforosuveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5d2437-2395-4c60-8962-6ceb047ce7b4/93916974029.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6638740f1034a5cce539e/t/5fcda5666f0099009e806346/1607312744778/19051639218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fe3ab6-af6e-45fe-a96a-be6f6878a26d/vufeligijirilulurijajovab.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 5060 bytes
SHA-256: c2a608e240267f519f3e0f105113dff4dff2f74f62f79316087217c7ed9bf2c1
font_01_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 10880 bytes
SHA-256: 4bda8cbd94367c7248fba9db7a39a4e85e582fb00516672c14c552e8ec6dd5d3

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